@linkmyfan Should be 7 ;) -> "6 Essential Social Media Tools for Start-Ups":

The only essential principle for adopting social media is the strategic objective i.e. why are you using these social media tools for your start-up? It can vary from companies to companies. If you are not sure which one to use, at least first register your URLs to create accounts for Facebook Pages, Twitter, YouTube, Flickr first. Do not tap on them until you figure out exactly what you want to do with them. The backlash can be worst if you have started using these tools without an objective. Each tool can be specifically tapped to focus on one specific objective, for example, engaging customers’ feedback, providing documentation on how to use the product and talking about the design and the issue that your product is trying to solve. So, here are our 6 essential social media tools for start-ups: